單項選擇題A variable pitch propeller is made () a boss with separate blades mounted into it.

A.of
B.up of
C.from
D.out


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1.單項選擇題A single piece() fitted with bronze rings guides the piston in the cylinder liner.

A.piston skirt
B.piston crown
C.guide way
D.cross-head

2.單項選擇題A separate piston cooling system is used to limit any contamination () piston cooling glands() the piston cooling system only.

A.between;to
B.either;or
C.from;to
D.neither;nor

4.單項選擇題A reduction in load on a diesel engine results in () of speed of the crankshaft.

A.a reduction
B.an increase
C.an outing
D.a downwards

5.單項選擇題A number of cylinder liners are enclosed in one cast iron casing to form a ().

A.cylinder cover
B.cylinder block
C.cylinder frame
D.bed-plate